Home / 14,391.90-21,556.60-6,980.78

Finding the Fourth Proportional to 14,391.90, 21,556.60 and 6,980.78

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Solution

The fourth proportional to 14,391.90, 21,556.60 and 6,980.78 is: 10,456.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,391.90 : 21,556.60 = 6,980.78 : x
  2. Step 2: Convert to fraction form
    14,391.90/21,556.60 = 6,980.78/x
  3. Step 3: Cross multiply
    14,391.90x = 21,556.60 × 6,980.78
  4. Step 4: Simplify right side
    14,391.90x = 150,481,882.15
  5. Step 5: Solve for x
    x = 150,481,882.15/14,391.90
  6. Step 6: Final answer
    x = 10,456.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.